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Turn your throttle into a wireless walkaround! REMOTE CONTROL $89.95 plus $5 shipping Easy installation. 30-day money back guarantee • (800) 207-1842 Mon.-Fri. 10-6, Sat. noon-5 ET MasterCard VISA 1 TCC, Inc. 9134 Union Cemetery Road, Suite 259 Cincinnati OH 45249 Call or write for info on our products another. For modeling purposes, since sure would leak at the rear of the train, our trains are short, this might take one causing the brakes to apply. This factor fast-time minute per car. Another reason air-test facilities aren't used in classification yards is most swit- reduced brake-pipe pressure. ching is done using the locomotive's own Some of the applied brakes might fail **62.,i.",·"Kt·•·11 .•' · X'·Yi t'•. · ·· adiwilif•.lifiFil;94'N91*12*i•Ozlilt•jililmijaiwgi :Imild*imlilirmi#kifilibeellitist<kil•.fg:+I.•:. + Ir-•------- -1- .:-- · *,72.'f'. 1.9//b*6.#iwi nrs•*R.1,-t-:4,01 "5£3*#4't« 1,2.k//In: ":.'.ri* .-t:5* rvilkw:#r•.2•.•s•« You Can Do lt! 042 Learn by seeing .... "The Clinic" Video Demonstrations of basic techniques and advanced tips. At your hobby store! 042 Learn by reading The Scenery Manual The 150-page complete guide to creating realistic scenery. At your hobby storel 042 Learn by doing..........The Scenery Kit Experience over 24 terrain construction and landscaping products and learn new techniques. Contains everything you need to complete a 10"x18' model. Mail order only, $29.98 postpaid. For buyer's guide, =end $1.50 or five stamps. WOODLAND SCENICS® 314-346-3768 ./.-4/1 RO. Box 98, Linn Creek, MO 65052 ••314-346-5555 042Fax 26 JULY 1995 1$7#» - PRK.13#14:1':•fisti•#rezzhz:jaf,Mufjimiwt Afta#ULTEFMLE-aug'VIV Ii:sete-f>*Se;#492:419, ..44*&84 •S•/9,•••. •4*»3•litt»-9293*/5&•e•.i:*3··: Y'*·':ty' 7.036... ... - · .: . -» •WN14•1*H#''i•7--4#,W&»ie#v042 --Cr#-6.: ......i :. - . I--49«. •':•f:TEk/sill&2.:5•332%451•494,%492 Pal#•:*..9124»»,=.2.0'..: independent brakes. Obviously, there are to release, causing a train delay. Even if some occasions when switch engines use they did release, the overcharged resertrain brakes, such as when the cut of cars is too heavy for the engine to control with independent brakes alone. mf042*• .-•*-:.,1-.7...,••*..:a ..'*'M•:'.. :- 036.-A r*4#: 4-9-:Arb Reasons for not using train brakes in brakes that require stopping the train switching operations are twofold: The and having the crew walk back and mantime required to couple air hoses and ually release the brakes. This is an excelcharge brake systems is eliminated. in lent way to upset train dispatchers! addition, flat switching, humping, and e= kicking cars with the train air brake sys- »-St»..Y -79%05/92/:. • tem would be impossible. The minute a car was uncoupled, that car and the very near the locomotive end of the cut. Whilesome railroads have tested cuts of '+ .WK... . l'f:ij• :•R: e .e 3 . ..33••9.:;•i•-» whole train would go to emergency. t..• After a train is switched and ready to go, a yard air-test device is coupled at or ir•..121:4**W/:•.•f••r&• I :364•9%•• .ili:• 5..,/4kr/443,•sp#i •s.2 cars from the rear end or even the mid- •lk·**EfF#' ·2345•9%:• dle due to physical constraints in the 084*Wilersy#3%£24/Ase *3Sshim,Zil/'PIRM yard, it's not the recommended practice 6(•1%74•5*<94' -·111'2*2;e**:03• 4%407*1109•'B.•,1 949,45*•<2.4,1. brake-pipe gradient approaching the Pwns,Ma#r. 46«42*«i•40**Sifi difference in brake-pipe pressure at the 2;'2•73••-;1•"'••••t•:• legal 15 psi maximum (gradient refers to •*8%!0•:'12*•0•1 front end and the rear end of a train due lisise*!3• 3.z#.4:#» to leakage), then the reservoirs away i:er#,fi••••..•*3t· from the test device would be chargpd ,4*9 #42*&•:'.• .: :'A.;:036 about 15 psi less than the reservoirs •9•jF 8974,+ /0644,45336 . .6.q.Wa8 . 9kt.ARY; ··*S.*24 •t•i:H•••Ei near the test device. cut. As the engine began to pump up ki.4»-". of the cut, the road locomotive would be ••••Gltqr:•••,t. <••#••••••••• coupled to the undercharged end of the If the air test was made from the rear fk#&2 :*74. - S ·i•Fred Cadson brake-pipe pressure, the undercharged It's a very subtle detail but air hoses in yards head-end reservoirs would charge to full can be just as important to model railroad brake-pipe pressure but the pipe pres- yard operations as they are to the prototype's. , /5*:.. 1,=* .* ant•it:,tonsceer,i:fuascou•,3ty,tl= 1:81•»1'tj<•••M<• voirs could cause a gradual brake application on a few of the rear cars after the train departed. This leads to sticking is caused by the fully charged auxiliaryreservoir pressure being higher than the WORKSHOP 661'"11111 ; 4,141l•.71/'79 1 t: fi, ·ls'!/ IL036•6••1 921*7« i.::9-111.Y.:*Trf'.,tt,;..< 5.:.::. ...: N., • 1..':*R25*9•9:••i.•4*EM#,lit:i.:.0:Tr-=ir:,lgrtiff'£ 4.I(&'i,:1-.)•Ri'•*0",•1f•FE'SE-Efif-:1;.i:2':B=r'1 ei*,2,"•6•6•1,16&Fpfil•p-*"•1••••---=-• •,111*epigEdjIifillIr2-.1•gaaia f,IIi.t••I#I##47-•--•EmfEEESE%%*BEEBEAE &6:•8•EBBE'ssfEE<EfeSIes·'se // ,':r,r:'417;•*. 7.••Q•••I---·-- •••1•,•iS«f -' r-i ' 4.b41*•'••• &%WAMgkt£%*t*A<6-'f=· 7.... NY.i'·'477''Ss.As·19:*.b .% 1. 1..1 :/1=099/2/'PI•*** «10·4*:.-,--». "e.*>,»:.-.1 - *221••F••.•.•#SS-*Ati.*---5.-.--'199./.---24*,1,-B••$6-6-ilikad•••biliaf1*1511iali•i•/•I.'92/"fl (-' ......6••036...... ,·,-·r----4.- . i.: --' - · t.:036r. *.:::::I=-•»«I.• •11.,1.'.1. . n. I .ilk.- 2=h 6.21.Illilt*...4 • .C.· Ip'.:Rt·42"fin,lifer. 9.-&41SiMIWI:-..:2...Sti: .ilifxgh,5.f=f333>exes/#Mill//i/flus* d · 5 •·."lit.SEEammA'*: -'1..:.., 3,11 4112-WA 1//OF.i )FMW.:-:===,idvillv• ' '6*•011 f•·.=r=·. . ·'/-•14.W• ·.ir-AP-- ·--01*:E=:'5925121*51 Fred Carlson This air compressor building at the Illinois Central's Markham Yard in Homewood, 111., is typical of the structure needed to model air tests on a layout The steel tank to the right is one of the three air reservoirs on the outside of the small brick building. ......-- ..----.-....#*#.N# ': ;523FE//821/Fill"/O . 44 kkE•b-• i,10.-,pi'c•·:':i»." 4.2471*